Joan Chandos Baez (born January 9, 1941) is an American folk singer, songwriter and activist.

Baez has a distinctive vocal style, with a strong vibrato. Her recordings include many topical songs and material dealing with social issues.

Baez began her career performing in coffeehouses in the Boston-Cambridge area, and rose to fame as an unbilled performer at the 1959 Newport Folk Festival. She began her recording career in 1960, and achieved immediate success. Her first three albums, Joan Baez, Joan Baez, Vol. 2, and Joan Baez in Concert all achieved gold record status, and stayed on the charts for two years.

Baez had a popular hit song with "Diamonds & Rust" and hit covers of Phil Ochs's "There but for Fortune" and The Band's "The Night They Drove Old Dixie Down". Other songs associated with Baez include "Farewell, Angelina", "Love Is Just a Four-Letter Word", "Joe Hill", "Sweet Sir Galahad" and "We Shall Overcome". She performed three of the songs at the 1969 Woodstock Festival, helped to bring the songs of Bob Dylan to national prominence, and has displayed a lifelong commitment to political and social activism in the fields of nonviolence, civil rights, human rights and the environment.

Baez has performed publicly for over 50 years, released over 30 albums and recorded songs in at least eight languages, although she is only fluent in Spanish and English. She is regarded as a folk singer, although her music has diversified since the 1960s, encompassing everything from folk rock and pop to country and gospel music. Although a songwriter herself, Baez is generally regarded as an interpreter of other people's work, having recorded songs by The Allman Brothers Band, The Beatles, Jackson Browne, Bob Dylan, Woody Guthrie, The Rolling Stones, Pete Seeger, Paul Simon, Stevie Wonder and many others. In recent years, she has found success interpreting songs of modern songwriters such as Ryan Adams, Steve Earle and Natalie Merchant.